AC FUNDAMENTALS - PART - 05 POWER IN A RESISTIVE, INDUCTIVE AND CAPACITIVE CIRCUIT INDUCTIVE CIRCUIT

In any quarter-cycle, the positive power and the negative power are equal and thus they cancel each other. Consequently, in a purely inductive circuit the average power over a complete cycle is always zero and it varies at double the frequency of the supply voltage.

CAPACITIVE CIRCUIT

The average power over a complete cycle is zero and the instantaneous power varies at double the frequency of the supply voltage.